Matarial replication issue

Business scenario is classic & 2 backend system(backend 1 is already up & running ) for backend 2 I have tried the material replication form ECC to SRM, current status in R3AM1

DNL_CUST_BASIS3 is green

DNL_CUST_PROD0 is green

DNL_CUST_PROD1 is green

now while trying to load the material i have below issue & queries

in MARA table of back end 2 there are some entries for which the material group is not available in T023 table, while replication i maintained the filters in r3ac1 tcode for those particular materials however in R3Am1 for "Material" load the block size is shown as "0" (is this to be different ?) & out of 2541 materials only 900 got replicated ( please note that i maintained the filter for 67 items only ) how do i replicate the left out materials? I am performing these in test environment ..however i want to know how to tackle these issues while doing it in production system.

@Moacir.. forgive my ignorance but isn't the filter setting in r3ac1 maintained so that those categories /materials can be avoided?

what I mean to ask is I have some 70 entries in MARA table which refer to MATKL 702 & 705, these MATKL are not present in T023 table , so in order to skip these materials & continue with other materials I have maintained the filter settings as below screenshot

but in my comm_product table out of 2540 entries in Mara table only 900 were replicated & these were just 40 entries before the above mentioned material group entries .i wanted to know how to replicate the other materials after MATKL 705.please let me know if my understanding is incorrect or my approach is wrong .

@ Benjamin I'm doing this activity for the first time in test system.. no I have not tried using R3AR2 & R3AR4. I will however do it & share the result soon.

Thanks a lot for your replies , I have been able to replicate 2114 out of 2345 ( the rest did not have material type valid ) I followed the suggestion of maintaining the materials that I want in the R3AC1 tcode

Thanks once again for all your suggestions & support. I will follow the same method while trying to replicate materials in production system .